/*********************************************************************
 * Copyright (C) 2007 Andrew Khan
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package jxl.write.biff;

import java.io.IOException;
import java.io.OutputStream;

/**
 * Interface to abstract away an in-memory output or a temporary file
 * output.  Used by the File object
 */
interface ExcelDataOutput {
    /**
     * Appends the bytes to the end of the output
     *
     * @param d the data to write to the end of the array
     */
    public void write(byte[] bytes) throws IOException;

    /**
     * Gets the current position within the file
     *
     * @return the position within the file
     */
    public int getPosition() throws IOException;

    /**
     * Sets the data at the specified position to the contents of the array
     *
     * @param pos the position to alter
     * @param newdata the data to modify
     */
    public void setData(byte[] newdata, int pos) throws IOException;

    /**
     * Writes the data to the output stream
     */
    public void writeData(OutputStream out) throws IOException;

    /**
     * Called when the final compound file has been written
     */
    public void close() throws IOException;
}
